Phocacius’s gists

Phocacius / RateAppManager.java

Last active October 29, 2016 11:23

Simple Android Java class that allows you to determine whether or not to show a "rate my app"-dialog and allows you to show the dialog that takes the user to the Play Store when the dialog is confirmed.

	public class RateAppManager {

	private static final String MS_PREFS = Prefs.class.getSimpleName();
	private static SharedPreferences preferences;

	private static final String APP_START_COUNT = "appStartCount";
	private static final String APP_INSTALL_TIMESTAMP = "appInstallTimestamp";
	private static final String RATE_DIALOG_SHOWN = "rateDialogShown";

	private static SharedPreferences getPreferences() {

Phocacius / MetricsCalculator.java

Created December 11, 2014 10:05

Android class that converts density to raw pixels and vice versa

	public class MetricsCalculator {

	public static float convertDpToPixel(float dp,Context ctx) {
	Resources resources = ctx.getResources();
	DisplayMetrics metrics = resources.getDisplayMetrics();
	return dp * (metrics.densityDpi / 160f);
	}

	public static float convertPixelToDp(float px, Context ctx) {
	Resources resources = ctx.getResources();

Phocacius / calendar.php

Created December 30, 2014 19:07

A php function that outputs a calendar for a given month and year. Optionally, a heading (e.g. weekdays) can be displayed, and the current day is highlighted. The calendar can be styled via CSS.

	<?php
	function drawCalendar($year, $month, $heading = null, $forceSixthRow = false) {
	$daysInMonth = date("t", mktime(0, 0, 0, $month, 1, $year));
	$daysInPrevious = date("t", mktime(0, 0, 0, $month-1, 1, $year));
	$weekdayOfFirst = date("N", mktime(0, 0, 0, $month, 1, $year)) - 1;
	$rows = ($forceSixthRow \|\| $weekdayOfFirst + $daysInMonth > 35) ? 6 : 5;
	echo '<table class="calendar" border="1">';
	if($heading != null) {
	for ($i=0; $i < 7; $i++) {
	echo '<th>'.$heading[$i].'</th>';

Phocacius / Sha1Hasher.cs

Created January 5, 2015 10:53

A tiny helper C# class that converts an arbitrary string to an hex encoded SHA1 hash.

	using System;
	using System.Security.Cryptography;

	namespace MyNamespace
	{
	public class Sha1Hasher
	{
	public static string sha1Hash (string plaintext)
	{
	SHA1 sh1 = SHA1.Create ();

Phocacius / WearableCommunicator.java

Created January 7, 2015 09:53

Simple to use communication handler between an Android handheld and an Android Wear device

	public class WearableCommunicator {

	private static WearableCommunicator communicator;

	public static WearableCommunicator getInstance() {
	if (communicator == null) {
	communicator = new WearableCommunicator();
	}
	return communicator;
	}

Phocacius / DensityCalculator.java

Created January 9, 2015 08:34

Get the smallestWidth property in density pixels for the current device. >= 600 dp is a 7' tablet, >= 720 dp is a 10' tablet.

	public int getSmallestWidthDensity(Activity context) {
	DisplayMetrics metrics = new DisplayMetrics();
	context.getWindowManager().getDefaultDisplay().getMetrics(metrics);

	int widthPixels = metrics.widthPixels;
	int heightPixels = metrics.heightPixels;
	float scaleFactor = metrics.density;

	float widthDp = widthPixels / scaleFactor;
	float heightDp = heightPixels / scaleFactor;

Phocacius / ViewHolder.java

Created January 9, 2015 11:03

A generic Android ViewHolder class that simplifies the standard ViewHolder pattern. Credit goes to http://www.piwai.info/android-adapter-good-practices/

	public class ViewHolder {
	@SuppressWarnings("unchecked")
	public static <T extends View> T get(View view, int id) {
	SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();
	if (viewHolder == null) {
	viewHolder = new SparseArray<View>();
	view.setTag(viewHolder);
	}
	View childView = viewHolder.get(id);
	if (childView == null) {

Phocacius / copygitrepos.sh

Created January 14, 2015 16:05

copies an arbitrary Git repo (including all branches and tags) and pushs it to another repo. The destination repo has to be completely empty!

	mkdir tmp
	echo 'Enter URL of old repo:'
	read oldrepo
	echo 'Enter URL of new repo:'
	read newrepo
	cd tmp
	git clone --bare $oldrepo
	REPO=`ls`
	cd $REPO
	git remote add destination $newrepo

Phocacius / httppost.js

Created January 24, 2015 19:44

send http post via Javascript without Ajax

	httpPost = function(url, params) {
	var html = '<form action="' + url + '" method="post">';
	for(key in params) {
	html += '<input type="text" name="'+ key +'" value="'+ params[key] +'" />';
	}
	html += '</form>';
	$(html).submit();
	}

Phocacius / MethodAnnotation.java

Created January 28, 2015 15:32

template for a method annotation processor

	Method[] methods = this.getClass().getMethods();
	for (Method method : methods) {
	MyAnnotation annotation = method.getAnnotation(MyAnnotation.class);
	if (annotation != null) {
	Object myAnnotationAttribute = annotation.value();
	// do whatever you want here
	try {
	method.invoke(this, methodParameters);
	} catch (IllegalAccessException\|InvocationTargetException e) {
	e.printStackTrace();

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